Door-closer



T. E. COLLINS.

} DOOR CLOSER. APPLICATION FILED ozc.22. 1919.

1 ,398, 3 1 7, Patented Nov. 29, 1921.

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tiara THOMAS E. COLLINS, OF CHICAGO, ILLINOIS.

DOOR-CLOSER.

Specification of Letters Patent.

Patented Nov. 29,1921.

Application filed December 22, 1919. Serial No. 346,725.

T all whom it may concern. v Be 1t known that l, THOMAS E. CoLLms, a

' citizen of the United States, residing at Chi.-

cage, in the county of Cook and State of lllinois, have invented certainnew and useful. Improvements in Door-Closers, of which the following isa specification.

My invention relates to non-liquid door closers, the object being toprovide a simple and eflicient device of this class with few parts inwhich the disadvantages inherent in the use of liquid are eliminated. Afurther object is to provide a device of this class which can be used onright or left hand doors without any modification whatever.

A further object is to provide a device of this class with means whichpositively returns the door to a closed position with automaticallyoperated means for regulating the speed of the power mechanism forreturning the door to a closed position.

The above and other features of novelty,

advantages and capabilities will become apparent from the detaileddescription of the accompanying drawings in which I have illustratedsuch a device embodying one form of my invention.

Figure l is a plan view of a door closer embodying one form of myinvention, ap-

lied. p Fig. 2 is an enlarged sectional view taken on the line 2-2 ofFig. 1.

Fig. 3 is an enlarged sectional view taken on the line 33 of Fig. 2.

Fig. 4 is a detailed view of certain of the parts more fully describedhereinafter.

Referring to the drawings in detail. The door or swinging member shownin broken lines, is indicated by the numeral (10) and is mounted bymeans of a hinge (11) on the frame (12).

The construction shown consists generally of a casing having ears orlugs, by means of which the casing is adapted to be mounted on aswinging member, like a door or window, in which casing is mounted ashaft provided with a spring moto adapted to operate the shaft in onedirection, which shaft is operatively connected by a flexible belt orcable, to a bracket mounted on the frame adjacent to the swinging memberand an expanding brake mounted loosely on the shaft within the casingfor regulating the speed of the shaft when operated by the motor.

The casing indicated as a whole by the .gally expanding brake.

reference character is preferably made or cast in two parts, (1 1-) and(15) which parts are connected together by any suitable means as shown.Mounted in alined hearings in the casing is a driven shaft (16) whichshaft on one end extends outwardly beyond the casing. Mounted on theoutwardly extending end of said shaft is a drum (17) adapted to rotatewith the shaft. Wound around said drum and connected at one end thereto,is a flexible cable or belt (18) which flexible belt is connected at itsopposite end to a bracket (19), screwed to the frame (12) by anysuitablemeans, such as the screws shown. Mounted on the driven shaft,within the casing and adapted to rocent to the spring motor and'withinthe cats-- ing there is loosely mounted on the shaft (16) anautomatically operated, centrifu- This brake comprises a link (23)loosely mounted on the driven shaft (16) to each end of which link,there is pivotally connected, a swinging shoe (24). Fixed to each shoeis a weighted arm (25). Each shoe is provided with a frictionallyengaging surface, preferably of leather. Surrounding the perimeter ofthe brake shoes on the inside of the casing is a brake drum (26),preferably of leather. Adjacent to the link (23) and within the casingis mounted a ratchet wheel (27) adapted to rotate with the driven shaft(16). Mounted on the link (23') is a spring pressed pawl (28) designedto engage the ratchet (27) and cause the link (23) to rotate when theshaft (16) is driven by the spring motor. It will be noticed that thespring motor is constructed of a comparatively long strip of springsteel,consequently, making a comparatively large number of windings.This is an important feature, for with this arrangement the driven shaft(16) is rotated at a comparatively high speed which is necessary inorder to cause means of the pawl and ratchet arrangement,

7 By this arrangement the device is considerably simplified as the speedincreasing'gearing is eliminated, thus making the structure lessexpensive, more durable and utilizes no gear to get out of order.

Having described my invention what I claim is V V In a door closer thecombination ofa compact casing comprising two flat cupped shapedmembers, provided with alined bear ings, a shaft rotatably mounted insaid bearings and provided with a spindle on one end thereof, extendingbeyond the bearings sufficiently to receive a drum or the like, a springmotor having a comparatively large number of windings mounted aroundsaid shaft in one portion of said casing, and adapted to operate saidshaft in one direction, a centrifugal expanding brake loosely mounted onsaid shaft in the other portion 'ofsaid casing and directlyadjacent tothe spring motor and a pawl and ratchet for directly connecting thebrake with the shaft.

In witness whereof, I hereunto subscribe my name to thisspecification'in the presence of two Witnesses.

, THOMAS E. COLLINS;

Witnesses V I J osnrnmn HOLQUIST, Looms ROWE.

